As an American who usually gets mistaken for a Canadian while traveling, I know that some of us know they aren’t talking about us, but also that the people who they are talking about aren’t even in the conversation.
It’s effectively talking about people behind their back which is not that useful.
Netflix a wild one to include in that list, imo. What makes you think it's on the same level? If you're making some reference to "cultural importance" I would wager that ABC/CBS in the 90s had just as strong a pull as Netflix does today culturally.
It's really not cool to insult people, you know. This is in just as poor taste as when smug Americans say "Europoors".